TY  - RPRT
TI  - Mineralogy and stratigraphy of the lower part of the Pierre Shale, South Dakota and Nebraska
AU  - L.G. Schultz
PY  - 1965
DO  - 10.3133/pp392b
UR  - https://pubs.usgs.gov/publication/pp392B
ID  - pp392B
ER  -